private void btnSave_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < dataGridView.Rows.Count - 1; i++)
            {
                string rowCode = dataGridView.Rows[i].Cells[0].Value.ToString();

                if (rowCode == txtCode.Text && txtCode.Enabled == true)
                {
                    MessageBox.Show("Code already exist! Try another one!", "Mensaje", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    panel.Enabled = false;
                    defaultViewButtons();
                }
                else
                {
                    try
                    {
                        productBindingSource.EndEdit();
                        tableProducts.SaveChangesAsync();
                        panel.Enabled = false;
                        defaultViewButtons();
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message, "Mensaje", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
        }